This is a well done PunyInform game by Garry Francis in his usual style I would say. Lots of puzzles, minimal story, though an interesting setting I would say, without revealing too much.
You are searching for a pirate's treasure in an old mansion and you will encounter a lot of pirate stuff and apparently some magical stuff too (or very advanced technology which I do not think).
I managed to solve the puzzles myself except for the riddle. It might be my English limitations - I never seem to get riddles in IF, be it Infocom or any other game. Otherwise, the puzzles were satisfying to solve and there were some surprises along the way.
A fun game in Garry's usual style. If you like solving other games by Garry, you will probably like this one too.